pub fn enter() -> Result<Enter, EnterError>Expand description
Marks the current thread as being within the dynamic extent of an executor.
Executor implementations should call this function before blocking the
thread. If None is returned, the executor should fail by panicking or
taking some other action without blocking the current thread. This prevents
deadlocks due to multiple executors competing for the same thread.
ยงError
Returns an error if the current thread is already marked